Re: Neon murder

• To: tesla-at-poodle.pupman-dot-com
• Subject: Re: Neon murder
• From: Tesla List <tesla-at-stic-dot-net>
• Date: Sun, 25 May 1997 22:39:52 -0500
• Approved: tesla-at-stic-dot-net

Subject:      Re: Neon murder
       Date:  Mon, 26 May 1997 13:09:31 +1200
       From:  "Malcolm Watts" <MALCOLM-at-directorate.wnp.ac.nz>
Organization:  Wellington Polytechnic, NZ
         To:   tesla-at-pupman-dot-com


Hi all,
         Just like to make a comment about "filtering chokes" with 
only a few 10's of uH of inductance. That value is comparable with or 
less than the inductance af most TC primaries. Surely you should be 
using at least a milliHenry or more???

Malcolm

> >  The problem is that the spark in the operating gap produces transient
> >voltages that can easily puncture the insulation in a neon. These
> >transients
> >are in the nanosecond range and are partially blocked by a choke of
> >about 30
> >microhenrys. Most coilers believe the chokes are for the peaks of the
> >operating dampened wave voltage which would require millihenry chokes
> >and
> >are not a problem. These peaks are usually less than twice the rated RMS
> >secondary voltage which the neon windings can handle. 
> >
> >  
> 
> John, how do you suggest building a 30uH choke? What works best, flat or
> cylinderical spiral, and does it get hot? Wire size?
> 
> Thanks in advance for any help.
> Tristan Stewart
> 
>

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